fix(dashboard): rename today-plan card to "Vaše dnešní zařazení"

Clearer, formal (matches the app's Vy/Vaše tone) and category-agnostic
(reads fine for work and absence days) so the employee plainly sees what
they're assigned to. Was "Můj plán na dnešek".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/admin/components/dashboard/DashTodayPlan.tsx

@@ -24,7 +24,7 @@ function projectLabel(p: TodayPlan): string {
 }
 
 /**
- * "Můj plán na dnešek" — shows the logged-in user's work-plan entry for today
+ * "Vaše dnešní zařazení" — shows the logged-in user's work-plan entry for today
  * (category + project/site + note, with a range badge when the day is part of a
  * multi-day range). `plan === null` = the user has plan access but nothing is
  * scheduled today (muted empty state). Rendered near the clock-in on the
@@ -38,7 +38,7 @@ export default function DashTodayPlan({ plan }: { plan: TodayPlan | null }) {
         variant="subtitle2"
         sx={{ mb: 1.5, fontWeight: 600, color: "text.secondary" }}
       >
-        Můj plán na dnešek
+        Vaše dnešní zařazení
       </Typography>
 
       {plan ? (